The present invention discloses a method of constructing a heat pipe that includes providing a heat pipe with phase change media therein and injection overmolding the heat pipe with a conductive composition. Molten glass is fed into a hollow cylinder of rotating member which rotates at high speed by means of a driving device and is heated. Further, such information is also used to adjust timing andor lift of the valve in the engine cylinder. 06 wt %min; producing a mixed powder by mixing the U3O8 powder with an UO2 powder by 2 to 15 wt %; producing a compact by compression molding the mixed powder; and sintering the compact in a reducing gas atmosphere at a temperature of 1600 to 1800\xb0 C. Methods for providing the novel n-dopants are provided.